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Optical fiber network
Md A
Md A May 07, 2013
Optical fiber network

I've seen these sensors...

Often 2
Occasionally 1
Rarely 4
Never 4
What is it? 0
2 Comments     11 Tags
Similar Photos: The pedestrian airbag from Volvo Green and red LED lights respond to sensors depending on the water quality. Vehicle detectors are imbedded in the pavement at the approach to the intersection and are used to activate and extend the green displays.

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